Anybody know what this speedos out of?

Someone told me it was out of an Auburn but I think they're full of shit. I figure it had to be some kind of performance car since it registers 120. But who knows. Its stamped Waltham on the back.

 

Did I stump you all?

 

I'd think it was a big engine car from early 30s due to the 120 plus the style.

Waltham Watch & Tool co from Mass.

Try AACA.org on their "what is it" forum